X 5 2 y 3 2 9 July 8, 2019 16 32 64 128 3/2x + 5/3y = 7 9x - 10y = 14 X 2 y 2 9 11 x 3 y 3 5 6 X 2 y 2 9 11 x 3 y 3 5 6 by elimination method X 2 y 2 9 11 x 3 y 3 5 6 by substitution method X+y 2 5+z xy
